Clutch grip mandrel.



M. AJMHERt CLUTCH GRIP MANDREL. APYI'JQATION FILED M114, 1910.

Patented Nov. S1i lf;

UNITED sTATEs PATENT oEEroE.

MAXIMILLIAN JAEGER, OF NEW LONDON, CONNECTICUT, ASSIGNOR OF ONE-HALF-TO WILLIAM F. SWORD, 0F PROVIDENCE, RHODE ISLAND.

CLUTCH-GRI?v MANDEL.

specification of Leners raient.

Patented N 0V. 8, 1910.

Application led January 14, 1910. Serial No. 538,096.

To all whom it may concern:

Be itknown that I, MAxiMlLLIAN JAEGER, a citizen of. the United States, residing at- New London, in the county of New London and State of Connecticut, have invented new and useful Improvements in Clutch- Grip Maudrels, of which the following is a. speciication. y

This invent-ion rovides aV workvholder de- -the work in one direction and engaged upon-l rotation of the work in the opposite' direction, the mandrel having a recess in a side adapted to receive a roller, which isadapted to move upon the inner wall of said recess and in one position to .be released from the work and in another Sition Atogrip the workbya wedging actlon.

The invention consists of the novel features, details of construction and con1bination of parts, 'which hereinafter will be more particularly set forth, illustrated in the aceompanyin drawing, and pointed out in the appended c aims.

Referring to the drawing, forming a' part' of the specification, Figure 1 is a side view of the head stock of a metal turning lathe provided with a mandrel roller clutch emliodying the invention. Fig. 2 is a view in elevation of the mandrel clutch, a portion being broken away to show the journal at the. inner end of the roller clutch. Fig. 3 is an end view of thc mandrel. Fig.l 4 is a transverse sect-ion on thc line 4-4 of Fie. 2. Fig. 5 is a sectional View similar to Fig. 4 of a modification.

Corresponding and like parts are referred to in the following description, and indicated in all the views of the drawing, by the same reference characters.

'lhe mandrel` which'may he of any .size or form according to the machine for which designed and the special nature of the vorl iu hand,r comprises ashank portion lyand a work-gripping portion 2, a shouldt or annular liauge 3 separating the two parts l and 2. A'reeess 4 is provided m a, side of the work-gripping portion 2 and the inner wall 5 of said recess is straight and is nearer the surface at one end than at the opposite end, with the result that the. recess 4 l deeper at one side than at the opposite side. The work-gripping )ortion 2 is preferabl c lindrical and the sha-nk portion 1 tapere a though these forms are notessential and may vary to suit the Work and machine for which the device .is intended. The recess 4 extends throughout the length of the work# gripping portion 2 and isadapted to receive a ro ler 6, which constitutes a clutch, the

4diameter of-the roller corresponding approximately to the de h of the recess 4 at the deepest'side, so t st when they roller G occupies a. position 'at the deepest side of the recess 4 the work may be slip ed on and of from the cylindrical art '2 o? the mandrel'.

The roller 4 is of uni orm diameter .through-A out its-length and is provided at its end s with journals 7 adapted to enter slots 8 `in the endwalls of the recess 4,.- the inner end wall corresponding withthe shoulder formed at the'base ofthe cylindrical part 2 and the l outer wall consistin of'a cap plate 7, which is secured tothe en of the mandrel in any manner, as by means of a machine screw or fastening 9. The slots 8 parallel the wall 5 of the recess 4. The purpose of the slot-s 8 and journals 7 is to'prevent displacement of the roller 6 from the recess 4. The roller G constitutes a clutch and is adapted to Wedge between the inclined Wall 5 of the recess 4 and the wall of the door opening formed in the work slipped upon the mandrel. lRotation'of the work upon the mandrel in one direction causes the roller 6 to' ride upon the wall 5 and to Abecome wedged between said wall and the wall of the-opening or door of the work'mounted -uponthe mandrel. Rotation of the work in the opposite direction causes the roller G to move downward upon the wall 5 toward the deeper side of the recess 4, thereby releasing said wal] and admitting of the work being released aud slipped from the mandrel. It is to he understood thatV the roller .6 will be of tempered steel or case hardened, so as to resistmarringof its surface by gripping of the work, particularly when the latter is subjected to high pressure; and also that thc mandrel is likewise of hardened steel and ground.

ln the modifieation shown in`Fi 5 the cylindrical portion 2 ofthe mandre is provided with a series of longitudinal recesses 4 and each recess is provided with a roller clutch which is mounted therein and retained in place in substantially the same manner as set forth in connection wlth the construction disclosed in Figs. 2, 3 and 4:.

'a side with a From the foregoing description, taken in connection with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which theinvention appertains, and while I-have described the principle of operation of the invention, together with the device which I now consider to be the embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and that such changes may `be madeJ when desired as are within the scope of the claims appended hereto.

Having thus described the inventiomwhat is claimedv as new, is

'1. A. work holding mandrel provided in longitudinal recess having its inner wall straight, said recess being deeper at one side than at the opposite side, and having end walls in which are formed slots extending parallel with the inner wall of said recess, and aroller clutch placed in said recess and having terminal journals fitted in said 4slots in the en d walls of the recess, said roller clutch being of `a diameter' greater than the depth of the shallower side of (he recess and of a diameter corresponding approximately to the depth of the deeper side of said recess. l.

2. A work holding mandrel comprising a tapered end portion, a cylindrical end pfo'i'- tion, and an intermediate shoulder or annular enlargement, and having a recess formed in a side of the cylindrical portion and extending the entire length thereof, Said recess being deeper at one slde than at the opposite side and having its inner wall straight, theshoulder formed at lthe base of the cylindrical portion having a slot extending parallel with the inner straight wall of the recess, a roller arranged in said recess and 

